Pothead.



P. F WILLIAMS.

EQOTHEAD.

APQLICATXQN HLED JAN. ze, 1911.4

Patented Sept. 8,1914

UNITED STATES PALTENT OFFICE.`

PAUL F. WILLIAMS, OF CHICAGO, ILLINOIS, ASSIGNOR T0 G. & W. ELECTRICSPECIALTY CO., OF CHICAGO, ILLINOIS, .A CORPORATION OF ILLINOIS.

POTHEAI).

To all whom it may concern Be it known that I, PAUL F. WILLIAMS, acitizen of the United States, residing at Chi-1 cago, in the county ofCook and State ot Illinois, have invented a certain new and usefulImprovement in Potheads, of which the following is a full, clear,concise, and exact description; reference being had to the accompanyingdrawings, forming a part ot this specification.

My invention relates to cable terminal devices, and especially to a formot device which Ihave called a pot head. These de vices ordinarilyconsist of a casing made usually of insulating material, and providedwith structural features which will permit the cable end to be led intothe device, and the strands or conductors to be Separated out andconnected with line wires or other conductors.

The object of the present invention is to provide a simple, practicaland ell'ective de vice of this kind, and also to provide nnproved meansfor mechanically conmwting the device to the cable end, which means maybe called an end piece. In the present application I show severalarrangements by which this can be done, each embodying the generalfeature of a member such as a plug or collar, adapted to close thespaceor opening between the cable sheath, and the walls of the pot headorifice, or mouth, through which the cable is led, together withinstrumentalities for insuring a perfectly tight joint at such point.

i"In the accompanying drawings Figure l is view in vertical section of aterminal devlce or pot head embodying my invention; Figs. 2 and 3 areviews similar to Fig. 1, showing modified forms of the device.

-YfIn Fig. 1 I have shown a construction involving a collar or plug 10,having a threaded portion 1l, adapted to make threaded engagement withthe lower edge of the mouth l of the bottom of the pot head. This collaris also preferably provided with a iange 12 to engage the lower edge ofsaid mouth la. In this arrangement also I show the upper edge of thelead sheath of the cable l bent outwardly to form a flange 13, and thisflange meets and abuts against the top edge of the collar 10. I alsoshow a supplemental collar or ring 14, arranged upon the cable portion 4laid bare by the removal of the lead covering. Screws 15 are desirfSpecification of Letters Patent.

Application led January 26, 1911,

Patented Sept. 8, 1914.

Serial No. 604,807

lcollar l0 by the ring 14 as shown, and then 'the interior of the bowlfilled with insulating compound in accordance With'the practice in suchmatters. It will be seen that my method of clamping the end of the cablegsheath provides a most eiiicient' water tight joint, as wel-l as onewhich is readily mstalled and cheaply manufactured.

In Fig. 2 I show an arrangement substantially like that of Fig. 4,except that the collar 10EL of Fig. 2 has a downwardly pro]ect ingextension 16, extending down the cable sheath for convenience ofapplication and for forming a more extended grip of the' collar upon thecable sheath.

The arrangement shown in Fig. 3 is similar to that of Fig. 2, exceptthat it has a lug member 1T similar to the member 16 of IFig. 2,. buthaving an enlarged socket at its lower end adapted to fit over andreceive a pipe 18 inclosing the cable. It will be seen that in vthisarrangement as in the others the slopin(T shoulders of bthe plug memberfilling the ca ile inlet allow the compound to work down well to thebottonof the device, and so form an eiiicient seal, and also to Work inunderneath the ilange formed on the cable sheath.

It will be understood that changes and modifications can be made withinthe scope of the appended claims without departing from the spirit ofthe invention.

Vv'hat I claim is:

1. A cable pothead comprising in combination. a casing provided with aninlet aperture, a perforated plug for closing said aperture projectingwhen in normal position within said casing, the outer edge of said plugwithin the casing being cut away to provide a space for insulatingcompound between the plug and the casing.

2. A cable pothead comprising in combination, a casing having an inletaperture, a perforated plug for closing said aperture engaging theinside of the pothead, a cable sheah entering the )othead through theperforation in said pllug and. iared out in Contact with vthe inner faceof said plug, u.

ring for clamping the end of said sheath sov against the inner face ofsaid plug, said ring being of less diameter than the interior of saidpothead 'and said plug beingr cut away at a point immediately beyond theouter edge of said ring forming a space for cornpound extending betweenthe. casing on one side and the ring. and end of the cable sheath on theother side to a point below the end of the cable sheath whereby thejoints on both sides of said sheath may be sealed with com-e pound.

3. A cable othead having in combination, a casing, a collar throughwhich the cable is led having screw threaded connection with the insideof the mouth of the casing, and means independent of the casing forsecuring said collar to the cable.

4. A device of the class specified, having a collar 10, provided with ascrew threaded connection with the mouth of the device, into which thecable is led, said collar l()a having a flange 12 to engage the loweredge of the device, a ring 14 within the mouth of the device, incombination with a cable having its metal sheath bent outwardly to forma flange,` which is interposed between the collar 10"l and ring d4, andscrews 15 to secure the ring 14 and collar l0a together,

5. The combination of a casing having an aperture, a perforate plug forclosingy said' aperture having a socket, a cable having a metallicsheath passing through said plug. and a. pipe surrounding the sheath ofsaid cable and engaging said socket. 4

6. A device of the class specified, having an inlet closing memberprovided with sloping shoulders to form a cavity between the closing`member and the wall of the device.

7. The combination of a casing having an inletapei-inre, an inletclosing member carried by said was' a cable provided with a metallicsheath pmsing into said Casing through said member, and a pipe surrounding said sheath, said member having means for inclosing the end of s .dpipe.

8. A device of the class spcciied, comprising in combination a casinghaving a cable inlet, a perf'oi'iie plug litted into vthe cable inlet, aring arranged above the perforalc plug and screws arranged to passthrough said ring and also `through the cable sheath when the latter isinterposed bob-veen the ring and plug.

i). AY cable pothcad comprising .in coinbination. a casing havingsubstantially tubular lower eml forming a cylindrical inlet aperture ofsul/istaniial length, and a perforated plug of cylindriiu form .tittedclosely into il inlet apex-lure, the outside 'upper edge et said plugbeine; beveled or cut away to provide a space iov sealing compoundbetween the plug and casing.

l0. A device of the class described havingr a cable inlet closingmember, provided with an inlet aperture through which the sheath of thecable led, said member being provided also with an esterni!" dependingflange having an interior diameter greater (han said inlet apertureivhercl-y said flange is adapted to iimlose .a pipe surrounding thecable sheath.

1n witness whereof, l hereunto subscribe my name his 18th day et'January A. D.,

PAUL l?. iVlLl/IAMS.

